Add a pair button to the UI. Fix the hardcoded MAC address string. Pass the device model in the pairing request.

src/com/limelight/Connection.java

@@ -1,9 +1,12 @@
 package com.limelight;
 
 import java.io.IOException;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.TimeoutException;
+import java.net.SocketException;
 
+import org.xmlpull.v1.XmlPullParserException;
+
+import com.limelight.nvstream.NvConnection;
+import com.limelight.nvstream.NvHTTP;
 import com.limelight.nvstream.NvmDNS;
 
 import android.os.Bundle;
@@ -12,12 +15,13 @@ import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.TextView;
+import android.widget.Toast;
 import android.app.Activity;
 import android.content.Intent;
 import android.content.SharedPreferences;
 
 public class Connection extends Activity {
-	private Button statusButton;
+	private Button statusButton, pairButton;
 	private TextView hostText;
 	private SharedPreferences prefs;
 	
@@ -59,6 +63,7 @@ public class Connection extends Activity {
 		
 		
 		this.statusButton = (Button) findViewById(R.id.statusButton);
+		this.pairButton = (Button) findViewById(R.id.pairButton);
 		this.hostText = (TextView) findViewById(R.id.hostTextView);
 		
 		prefs = getPreferences(0);
@@ -72,6 +77,60 @@ public class Connection extends Activity {
 				Connection.this.startActivity(intent);
 			}
 		});
+		
+		this.pairButton.setOnClickListener(new OnClickListener() {
+			@Override
+			public void onClick(View arg0) {
+				Toast.makeText(Connection.this, "Pairing...", Toast.LENGTH_LONG).show();
+				new Thread(new Runnable() {
+					@Override
+					public void run() {
+						String macAddress;
+						try {
+							macAddress = NvConnection.getMacAddressString();
+						} catch (SocketException e) {
+							e.printStackTrace();
+							return;
+						}
+						
+						if (macAddress == null) {
+							System.out.println("Couldn't find a MAC address");
+							return;
+						}
+						
+						NvHTTP httpConn = new NvHTTP(hostText.getText().toString(), macAddress);
+						
+						String message;
+						try {
+							if (httpConn.getPairState()) {
+								message = "Already paired";
+							}
+							else {
+								int session = httpConn.getSessionId();
+								if (session == 0) {
+									message = "Pairing was declined by the target";
+								}
+								else {
+									message = "Pairing was successful";
+								}
+							}
+						} catch (IOException e) {
+							message = e.getMessage();
+						} catch (XmlPullParserException e) {
+							message = e.getMessage();
+						}
+						
+						final String toastMessage = message;
+						runOnUiThread(new Runnable() {
+							@Override
+							public void run() {
+								Toast.makeText(Connection.this, toastMessage, Toast.LENGTH_LONG).show();
+							}
+						});
+					}
+				}).start();
+			}
+		});
 	}
 
 }

src/com/limelight/nvstream/NvConnection.java

@@ -2,7 +2,11 @@ package com.limelight.nvstream;
 
 import java.io.IOException;
 import java.net.InetAddress;
+import java.net.InterfaceAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
 import java.net.UnknownHostException;
+import java.util.Enumeration;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
@@ -33,6 +37,33 @@ public class NvConnection {
 		this.video = video;
 		this.threadPool = new ThreadPoolExecutor(1, 1, Long.MAX_VALUE, TimeUnit.DAYS, new LinkedBlockingQueue<Runnable>());
 	}
+	
+	public static String getMacAddressString() throws SocketException {
+		Enumeration<NetworkInterface> ifaceList = NetworkInterface.getNetworkInterfaces();
+		
+		while (ifaceList.hasMoreElements()) {
+			NetworkInterface iface = ifaceList.nextElement();
+			
+			/* Look for the first non-loopback interface to use as the MAC address.
+			 * We don't require the interface to be up to avoid having to repair when
+			 * connecting over different interfaces */
+			if (!iface.isLoopback()) {
+				byte[] macAddress = iface.getHardwareAddress();
+				if (macAddress.length == 6) {
+					StringBuilder addrStr = new StringBuilder();
+					for (int i = 0; i < macAddress.length; i++) {
+						addrStr.append(String.format("%02x", macAddress[i]));
+						if (i != macAddress.length - 1) {
+							addrStr.append(':');
+						}
+					}
+					return addrStr.toString();
+				}
+			}
+		}
+		
+		return null;
+	}
 
 	public void start()
 	{	
@@ -159,7 +190,7 @@ public class NvConnection {
 	
 	private void startSteamBigPicture() throws XmlPullParserException, IOException
 	{
-		NvHTTP h = new NvHTTP(host, "b0:ee:45:57:5d:5f");
+		NvHTTP h = new NvHTTP(host, getMacAddressString());
 		
 		if (!h.getPairState())
 		{

src/com/limelight/nvstream/NvHTTP.java

@@ -74,7 +74,10 @@ public class NvHTTP {
 	
 	public int getSessionId() throws IOException, XmlPullParserException
 	{
-		InputStream in = openHttpConnection("http://"+host+":"+PORT+"/pair?mac="+macAddress+"&devicename=ANDROID");
+		/* Pass the model (minus spaces) as the device name */
+		String deviceName = android.os.Build.MODEL;
+		deviceName = deviceName.replace(" ", "");
+		InputStream in = openHttpConnection("http://"+host+":"+PORT+"/pair?mac="+macAddress+"&devicename="+deviceName);
 		String sessionId = getXmlString(in, "sessionid");
 		return Integer.valueOf(sessionId);
 	}